(function(){
    // 缩放
    try {
        // 禁用双击缩放
        document.addEventListener("touchstart", function(event) {
        if (event.touches.length > 1) {
            event.preventDefault();
        }
        });
        var lastTouchEnd = 0;
        document.addEventListener(
        "touchend",
        function(event) {
            var now = new Date().getTime();
            if (now - lastTouchEnd <= 300) {
            event.preventDefault();
            }
            lastTouchEnd = now;
        },
        false
        );
        // 禁用双指手势操作
        document.addEventListener("gesturestart", function(event) {
        event.preventDefault();
        });
    } catch (error) {}
})()

